Основные математические понятия в английском языке. Прокошева И.И. - 4 стр.

                            Unit 1.Ordinal and relation signs
         Look through the table and try to memorize it.
signs         reading                         examples
1.            Firstly; or: in the first place
2.            Secondly; or in the second
              place
.             Point; or: decimal point
…             And so on to                    1, 2, 3… 25 (read: one, two, three
                                              and so on to twenty five
Λ∞            And so on to infinity           1, 2, 3… (read: one, two, three and
                                              so on to infinity
Θ             I: since, because
    x1        x one, or : x sub one
 x→∞          x approaches infinity or: x
              tends to infinity
=             is equal to, or: does not equal a=b; a equals b or: a is equal to ; or:
                                              a is b
 ≠            is not equal to; or: does not    a ≠ b ; a does not equal b; or: a is not
              equal                           equal to b; or: a is not b
α,~           (is) directly proportional to   p~ q
 ≈            approximately equals            a=b;
 ~            or : is approximately equal to a approximately equals b,
 ≅                                            or ; a is approximately equal to b
::            as (in proportions)             p:q :: s:t, read p(is) to q as s (is) to t
 ≡            Is identical with, or is always F(x)= 0 f of x(is) identical with zero
              equal to
  ( )         Parentheses; or : round
              brackets
[]            Brackets; or: square brackets
{}            braces
<             (is) less than                  p             (is) greater than               p>q; p (is) greater than q
≤             (is) not greater than           p, q stands for p=x=q
 >/           (is) greater than of equals     The closed interval p q stands x not
                                              less than
≥             (is) not greater than of equals a ≥ b a (is) greater than or equals b